The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 2005
Filed:
Dec. 17, 2002
Wolfgang Dohrmann, Eitorf, DE;
Thomas Hansen, Köln, DE;
Wolfgang Dohrmann, Eitorf, DE;
Thomas Hansen, Köln, DE;
ZF Boge GmbH, Bonn, DE;
Abstract
An impact damper for deceleration of a vehicle impacting on all obstacle by hydraulic damping forces and gas spring forces includes at least inner and outer pipes telescopically displaceable one inside the other and defining an annular space therebetween with a base closing one end of the inner pipe. A dividing piston is sealingly guided in the inner pipe. The inner pipe, the base, and the dividing piston define a gas space which holds gas under pressure. The inner pipe further defines a first liquid space separated from the gas space by the dividing piston. An intermediate wall is fastened to the inner pipe and includes a throttle opening therethrough connecting a second liquid space to the first liquid space. The annular space between the first and second pipes has one end sealed to the atmosphere and another end sealed by the intermediate wall. The annular space is connected to the second liquid space by a flow connection having a valve.